Objective: To establish a rapid bacterial identification and antimicrobial susceptibility testing assay in positive blood cultures, so as to provide insights into timely diagnosis and treatment of bloodstream infections. Methods: A total of 1 154 blood culture samples were collected from inpatients in Zhejiang Hospital from February to May, 2022. The bacterial isolates were enriched and purified using improved separation gel method, and bacterial identification and antimicrobial susceptibility tests were performed using VITEK2 mass spectrometry system and VITEK2 Compact automated microbiology system. The accuracy of the new assay for bacterial identification and antimicrobial susceptibility tests was evaluated with the conventional VITEK 2 compact system as the standard. Results: Of 1 154 blood culture specimens, the conventional VITEK 2 compact system detected 174 positives and 980 negatives. The new assay and the conventional VITEK 2 compact system identified consistent bacterial isolates in 165 out of 174 positive blood culture samples, and the accuracy of bacterial identification was 94.83% for the new assay, with a 99.21% accuracy for identifying Gram-negative bacteria and 82.22% for Gram-positive bacteria. Antimicrobial susceptibility tests were performed in 158 bacterial isolates, and the new assay presented a 90.17% accuracy, with a 90.27% accuracy for Gram-negative bacteria and 89.74% for Gram-positive bacteria. The conventional VITEK 2 compact system required 30 hours and longer to complete bacterial identification and antimicrobial susceptibility tests, and the new assay required 9 to 18 hours. Conclusions The new rapid bacterial identification and antimicrobial susceptibility testing assay shortens the time of bacterial culture, achieves rapid bacterial identification and antimicrobial susceptibility testing in blood culture specimens and has a high accuracy that meets clinical needs, which facilitates rapid diagnosis and treatment of bloodstream infections.

Objective To investigate the benefits of replanning after induction chemotherapy(IC) by analyzing the dosimetric impact of IC on intensity-modulated radiotherapy(IMRT)for locally advanced nasopharyngeal carcinoma(NPC)and the dosimetric characteristics of replanning after IC, and to provide data for the rational design of clinical radiotherapy plans. Methods 16 NPC patients underwent contrast-enhanced CT scan once before and after IC.Target volumes were delineated and the chemotherapy plans were created,defined as Plan-1 and Plan-2,respectively. Then the target structure after IC was copied to Plan-1, generating the third plan, defined as Plan-1-2. The paired t-test was used to compare the dosimetric parameters between Plan-1 and Plan-1-2 and between Plan-2 and Plan-1-2. Results Plan-1 vs. Plan-1-2:Plan-1-2 showed significantly reduced D meanof target volume compared with Plan-1(P<0.05). Plan-1-2 significantly increased D meanand D maxof the spinal cord(P<0.05),although significantly reduced D mean of the brain stem and D maxof the temporal lobes compared with Plan-1. Plan-1-2 also had significantly reduced conformity index(CI)and significantly increased homogeneity index(HI)for the target volume compared with Plan-1(P<0.05). Plan-2 vs. Plan-1-2:Compared with Plan-1-2, Plan-2 significantly increased D meanand D minof gross tumor volume(GTV)and primary GTV(P<0.05)and significantly reduced D meanof the temporal lobes and D maxand D meanof the spinal cord(P<0.05), with D max decreased to 430.48 cGy;Plan-2 had significantly increased CI and significantly reduced HI for the target volume compared with Plan-1-2(all P<0.05). Conclusions IMRT plan-1 after IC has worse dosimetric distribution,while replanning after IC has more dosimetric benefits.

Objective:To investigate the clinical efficacy of 3D printed osteotomy guide plate combined with "Jail" screw technique in the treatment of tibial plateau fractures involving external posterior condylar collapse.Methods:From January 2016 to January 2021, 41 patients (22 males and 19 females) with tibial plateau fractures involving external posterior condylar collapse were treated with 3D printed osteotomy guide plate combined with "Jail" screw technique and followed up. The age was 47.4±11.5 years (range, 22-69 years). According to Schatzker fracture type, 18 cases were type IV, 14 cases were type V and 9 cases were type VI. All fractures were closed, and 12 of them were complicated with lateral meniscus injury, but none of them were complicated with nerve and vascular injury. The time from injury to operation was 7.2±3.4 d (range, 4-17 d). All patients underwent 3D CT scanning and digital modeling before operation. According to the modeling results, a 1∶1 solid size fracture model was made by 3D printing, and the osteotomy guide plate and the "Jail" screw preset guide plate were designed. During the operation, the tibial lateral condyle osteotomy was performed with customized osteotomy guide plate. After reduction, the fixation of the fracture was performed with the preset guide plate using "Jail" screw. Postoperative fracture reduction was evaluated according to Rasmussen score, and knee function was evaluated by Hospital for Special Surgery (HSS) score.Results:All the 41 patients were followed up for 15.2±5.8 months (range, 6-26 months). Immediate postoperative radiographs showed good fracture reduction, and the average healing time was 14.1±1.2 weeks (range, 12-17 weeks). One year after operation, the Rasmussen score of knee joint was 17.4±1.6 points (range, 13-19 points), of which 31 cases were excellent, 8 cases were good, and 2 cases were fair, with an excellent/good rate of 95% (39/41). HSS scores was 87.3±5.6 points (range, 68-95 points), including 30 excellent cases, 10 good cases and 1 fair case, with an excellent/good rate of 98% (40/41). The range of motion of knee joint was 126.8°±3.8°. At the last follow-up, no serious complications such as common peroneal nerve injury, popliteal vascular injury, postoperative infection, or internal fixation failure occurred.Conclusion:3D printed osteotomy guide plate combined with "Jail" nail placement technique is an effective method for tibial plateau fractures involving external posterior condylar collapse, and the postoperative treatment results are satisfactory. The use of customized osteotomy guide plate is more accurate and less damaging. The use of "Jail" screw preset guide plate can ensure more accurate screw placement.

Objective:To compare the short-term therapeutic effects of Gamma 3 U-Blade system and Gamma 3 nails in the treatment of elderly patients with osteoporotic unstable intertrochanteric fracture.Methods:The data of 70 elderly patients with osteoporotic unstable intertrochanteric fracture were retrospectively analyzed who had been admitted to the Department of Orthopedics, Wuhan Fourth Hospital from June 2018 to December 2020. They were divided into 2 groups according to their treatments. In the U-Blade group of 35 cases subjected to fixation with Gamma 3 U-Blade system, there were 14 males and 21 females with an age of (77.7 ± 4.8) years; in the Gamma 3 nail group of 35 cases subjected to fixation with Gamma 3 nails, there were 14 males and 21 females with an age of (79.3 ± 5.2) years. The 2 groups were compared in terms of operation time, intraoperative blood loss, apex distance, fracture union time, postoperative complications, timed up and go (TUG) at postoperative 2 weeks, 3 months and 6 months, and hip function at postoperative 9 months.Results:There was no statistically significant difference in the preoperative general data between the 2 groups, showing comparability ( P>0.05). There was no significant difference either in operation time, intraoperative blood loss or apex distance between the 2 groups ( P>0.05). The fracture union time [(12.0 ± 0.2) weeks] and Harris hip score at postoperative 9 months [90 (90, 91)] in the U-Blade group were insignificantly different from those in the Gamma 3 nail group [(12.0 ± 0.3) weeks and 91 (89, 91)] ( P>0.05). The rate of implant-related complications in the U-Blade group [0% (0/35)] was significantly lower than that in the Gamma 3 nail group [17.1% (6/35)] and the TUGs at postoperative 2 weeks and 3 months [(80.2 ± 3.6) s and 45 (43, 49) s] in the former were significantly shorter than those in the latter [(89.3 ± 4.2) s and 56 (54, 59) s] ( P<0.05). Conclusion:In the treatment of elderly patients with osteoporotic unstable intertrochanteric fracture, compared with traditional Gamma 3 nails, Gamma 3 U-Blade system can reduce implant-related complications and facilitate early recovery of walking ability.

At present,precise radiotherapy has been widely used through the development with many years,but the existing technique still is limited by the limitation of tolerance dose of normal tissues,which cannot achieve the optimal goal of treating tumor.Flash radiotherapy(Flash-RT)is one kind of radiotherapy technique that uses the beam with ultra-high dose rate(UHDR)to conduct irradiation,which can furthest treat tumors while significantly reduce radiation injury of normal tissues.But until now,the biological mechanism,key physical parameters and triggering mechanism of Flash-RT are still unclear,and its principle and clinical translational application are still in the stage of research.This review clarified the technological advance and clinical translational application of Flash-RT research through summarized the relevant research of Flash-RT.

Objective:To differentiate hyperintense hepatocellular carcinoma (HCC) with focal nodular hyperplasia (FNH) in the hepatobiliary phase by MRI multimodal parameters.Methods:A retrospective cross-sectional study method was adopted. Clinical data on 15 cases with hyperintense HCC and 15 cases with FNH in the hepatobiliary phase admitted to the First Affiliated Hospital of the Army Medical University from January 2012 to December 2019 were collected. All patients with solitary lesions who underwent Gd-EOB-DTPA-enhanced MRI examinations were included. Surgically resected specimens were verified by pathological and immunohistochemical examination. HCC and FNH imaging features were analyzed by two radiologists.Results:(1) HCC and FNH apparent diffusion coefficient (ADC) values were 1 205.07±239.65×10 -3 mm 2/s and 1 434.73±217.6×10 -3 mm 2/s, respectively, and the SI ADC difference was statistically significant ( P<0.05) between the two groups. (2) In the dynamic contrast-enhanced MRI sequence, 15 cases of HCC were significantly enhanced in the arterial phase, of which 13 cases were characterized by continuous enhancement, and 2 cases were characterized by wash-in and wash-out enhancement. There was no statistically significant difference ( P>0.05) between the two groups. SI enhancement rate between HCC and FNH (1.39±0.60 vs. 1.33±0.50, P>0.05) had no significant difference. (3) HCC and FNH morphological features in the hepatobiliary phase included: annular hypointensity: HCC (8 cases) vs. FNH (0 cases); contrast filling defects: HCC (8 cases) vs. FNH (0 cases); linear hyposignal separation: HCC (10 cases) vs. FNH (0 cases); and stellate scars: HCC (0) vs. FNH (5 cases), and there were statistically significant differences ( P<0.05) between the two groups . Conclusion:Multimodal MRI have significant value for differentiating hyperintense HCC and FNH in the hepatobiliary phase.

OBJECTIVE: To explore the effects of intervention with oral probiotic METHODS: This study were conducted among 155 women in the third trimester of pregnancy with positive results of GBS culture in the Outpatient Department of Zhujiang Hospital from March to November, 2019. After excluding 32 patients who received lactobacillus intervention for less than 2 weeks or underwent postpartum GBS retesting, the women were divided into oral probiotics intervention group (60 cases) and non-intervention group (63 cases). According to the results of GBS retesting, the 60 women in the intervention group were divided into GBS-negative group (18 cases) and persistent GBS-positive group (42 cases). At the end of the intervention, the rates of negative GBS culture result were calculated and the pregnancy outcomes were compared. From 5 women randomly selected from the intervention group, samples of vaginal secretions were collected before and after the intervention for amplicon sequencing and bioinformatics analysis. RESULTS: At the end of the intervention, the GBS-negative rate in the intervention group was 30% (18/60), as compared with 23% (3/13) in the non-intervention group. Probiotic intervention significantly reduced the incidence of premature rupture of membranes ( CONCLUSIONS Intervention with oral probiotics can reduce vaginal GBS colonization in late pregnancy and improve the pregnancy outcome.
Female ; Humans ; Lactobacillus reuteri ; Lactobacillus rhamnosus ; Microbiota ; Pregnancy ; Probiotics/therapeutic use* ; Streptococcus agalactiae ; Vagina